Indicator



' 1,6 4,1 Jur-1e 28, 1927. CUNLEFFE 3 76 INDICATOR Filed NOV- 5. 1924 Mnpm III/III I I I I INVENTOR WITNESS:

ATTORN EY Patented June 28, 1927.

WILFBED CUNLIFFE, OF STAMFORD, CONNECTICUT.

INDICATOR.

Application filed November 3, 1924. Serial No. 747,650.

' The primary object of the present invention is to provide an electrolyte indicator for storage batteries that will enable an observer to ascertain ata glance whether the height of the electrolyte in the battery is sufiicient for adequate operation.

A further object of the invention is to provide an electrolyte indicator associated with the storage battery in such a manner whereby the removal of the caps of the battery is unnecessary, thereby when a battery which forms a part of the electric system of an automobile is provided with the indicator formingthe sub]ect matter of the present invention, the indicator may be positioned adjacent the drivers seat of the automobile, whereby it may be ascertained without movlng from the drivers seat if suflicient electrolyte is in the battery.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described illustrated in the accompanying drawings and specifically pointed out in the appended 'claim.

.In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the4sev-.

eral views, and in which: I

Figure 1 is a side view of the battery partly in section and illustrating the application of the invention, together with a diagrammatic view of its connection with an automobile. L i Y Figure 2 is a vertical sectional view through a portion of the invention which is directly associated with thebattery.

Figure 3 is a detail view of a portion of the structure shown in Figure 2.

Referring to the drawings in detail letter A indicates a battery of the usual construction, and B an instrument boa-rd oi an automobile. One of the filling openings of the batter which is adapted to fill one cell thereoi: threadedly receives a modified cap 1 which forms the main portion of the present invention. The cap 1 includes a bod portion 2 with an elongated portion 3 epending therefrom. The body portion 2 together with the dependin portion has centrally formed therethrougli a bore 4: for receiving a lead rod 5 having a head 6 formed on its the upper end and provided with threads adj acent the head to be accommodated in screw threads formed in the upper'end of the bore 4, as clearly shown'in Figure 2 of the drawings. The lower end of the lead rod terminates adjacent the lower end of the bore in the depending portion to provide a recess 8. which is adapted to receive electrolyte therein from the cell of the battery. The head 6 is provided with flat sides 9 and centrall'y formed in the head is an opening 10 to receive a headed brass bolt 11 having a threaded end 12 to which is secured a nut 13 positioned from the head by a washer 14.

The body portion therethrough, converglng vent openlngs 15. 7 The lower end of the depending portion together with the lead is adapted to extend 2 of the cap hasformed into one cell of the battery and within the electrolyte therein for a predetermined distance preferably to a point'adjacent the top of the plates of the'batterg whereby should.

the electrolyte fall below end of the lead the plates will still be covered.

Arranged upon the instrument board B of the automobile (not shown) is a lamp 16 and a switch 17 which are operatively associated through the medium of a conductor wire 18. The lamp is also connecte'dtothe bolt of the headthrough the medium of a conductor wire 19. While a conductor Wire 20 connects the opposite end of the switch 17 with the ground, as clearly shown in Figure 1 of the drawings. A conductor wire 21 completes the circuit from the ground to the battery and has its battery end secured to the negative terminal thereof, thereby completing an .electric circuit to the lamp providing theelectrolyte in the battery is of suflicient hei ht to be received in the recess 8 above re erred to.

From the above description and the drawings which form a portion of this application it will be seenthat when the switch 16 is-on, the lamp15 will light if the electrolytewithin the battery is of suflicient height and if the electrolyte is below the recess 8, the lam will not light thereby indicombination and arrangement of the sev 'forme l0 getherl therewith longitudinal bore,

eral parts, provided that such changes fall withm the scope of the appended claim.

What I claim is:

- In anindicator, an electrode therefor comprising a cap provided with converging vent eing formed wit a single a lead rod passingthrough the bore of the cap and received in the bore of the depending portion respectively, and said rod terminatlng adjacent the lower end of the bore of the elongated portion to provide a recess insaid depending portion, said rod being threadedly secured in said cap and an aperture flathead formed on the up er end of said rod.

ture.

V n testimony whereof I affix my signa 

